What is a dumbbell

Dumbbell is a simple equipment used to strengthen muscle strength training. Its main material is cast iron, and some are covered with a layer of rubber.
Its purpose is for muscle strength training, muscle compound movement training. Patients with low muscle strength due to exercise paralysis, pain, long-term inactivity, etc., hold dumbbells, and use the weight of dumbbells to exercise resistance against resistance and train muscle strength.
Dumbbells can train a single muscle; if you increase weight, you need the coordination of multiple muscles. It can also be used as a kind of muscle compound exercise training.
An auxiliary equipment for weightlifting and fitness exercises. There are two kinds of fixed weight and adjustable weight. ① Fixed weight dumbbells. It is made of pig iron with an iron rod in the middle and solid balls at both ends for practice. ②Adjustable dumbbells. Similar to a reduced barbell, round iron plates of varying weights are placed on both ends of the short iron bars, which are about 40 to 45 cm long, which can increase or decrease the weight when lifting weights or fitness exercises. Regular dumbbell exercises can increase muscle strength in various parts of the body.

In addition to iron dumbbells, there are also wooden or plastic dumbbells. When practicing, use the percussive sound of wooden dumbbells or plastic dumbbells to cultivate the practitioner's coordination and sense of rhythm. You can also weave wooden dumbbells into a complete set of gymnastics performances.